(1) An organisation’s rules may provide for filling a casual vacancy in an office for the organisation.
(2) However, the rules must not allow the filling of a casual vacancy other than by ordinary election, if the unexpired part of the term of the office for the organisation is longer than the greater of—(a) 1 year; or(b) three-quarters of the term of the office.
(3) If a person fills a casual vacancy in an office for an organisation under this section, the person is taken to have been elected to the office.
(4) In this section—
"term" , of the office, means the period for which the person last elected to the office by an ordinary election, other than by an ordinary election to fill a casual vacancy, may hold the office without being re-elected.